Crack-preventing means for looms.



No. 804,964. PATENTED NOV. 21,1905. A. M. MARGOUX.

CRACK PREVENTING MEANS FOR LOOMS.

APPLICATION FILED MAY 25, 1905.

2 SHEETS-SHEET l.

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No. 804,964. PATENTED NOV. 21, 1905.

A. M. MARGOUX.

CRACK PREVENTING MEANS FOR LOOMS.

APPLIGATION FILED MAY25,1905.

2 SHEETS-SHEET 2,

22666366" I Ewe/711 672 UNITED STATES -PATENT OFFICE.

ALIDA M. MARCOUX, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORA- TION OF MAINE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed May 25, 1905. Serial No. 262,153.

To all whom it may concern.-

Be it known that 1, ALIDA M. MARGOUX, a citizen of the United States, and a resident of 'Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Crack-Preventing Means for Looms, of which the following description, in connection with the accompanying drawings, is a'specification, like characters on the drawings representing like parts.

In the weaving of cloth what is technically termed a crack is formed when the filling is not beaten in as firmly or compactly as it should be, so that a more or less readily discernible stripe is made across the cloth, and it constitutes a fault which detracts not only from the appearance, but also from the value of the cloth in which it occurs.

When a loom is running at normal speed, the lay, by reason of its momentum, causes the reed to beat in the filling on each pick with the proper degree of firmness and closeness; but when the power is thrown off the loom the lay will not beat up quite so far, owing to the rapidly-decreasing momentum between the instant when the power is thrown off and the complete stoppage of the lay.

In some looms the lay may make two or more forward picks before coming to rest,

and if only one forward beat is made after the power is thrown off there is nearly always a tendency to form a crack, because the filling will not be beaten in so compactly as before.

My present invention has for its object the production of simple and effective means to prevent the formation of cracks in the cloth.

The various novel features of my invention will be fully described in the subjoined specification, and particularly pointed out in the following claims.

Figure 1 is a top plan view centrally broken out of a portion of a loom with crack-preventing means embodying one form of my invention applied thereto. Fig. 2 is an enlarged transverse sectional detail on the line 2 3, Fig. 1, looking toward the right, showing the crack-preventer in-its operative position to subject the cloth to tension; and Fig. 3 is a similar view, but showing the position of the crack-preventer when the power is thrown off the loom and the cloth is permitted to slacken.

In accordance with my present invention 1 provide means to slaoken the cloth between the fell and the take-up when the power is thrown off the loom, so that the fell moves back slightly toward the reed, and thereby the filling, beaten in by the gradually-slowing lay, is beaten in practically as firmly as before, and a crack is prevented.

To statethe action in another way, as the reed does not come forward quite so far when the power is thrown off the loom the fell of the cloth moves back toward the reed, so that their proper relative position at the instant the filling is beaten in is preserved.

I have shown in Fig. 1 a loom provided with an automatic filling-replenishing mechanism at F and with a filling detector or fork at each side, as at ff, to detect filling failure on alternate picks, a form of loom largely in use, though my invention is not restricted thereto. A loom so equipped makes very perfect cloth in other particulars, and for that reason means to prevent the formation of cracks is highly desirable when applied thereto, as the character of the cloth is improved by the elimination of a faulty formation therein.

Temples T T and their stands T T respectively, mounted on the breast-beam A the lay A provided with a reed of usual construction, (not shown,) the shipper Sand the notched holding-plate N therefor, and the take-up or sand-roll M of the take-up mechanism may be and are all of well-known construction.

In the present embodiment of myinvention a tension-bar 1 is extended transversely across the cloth C between the take-up instrumentality and the fell, as clearly shown in Fig. 1, the ends of the bar being mounted in the rear ends of rocking supports 2, fulcrumed at 3 on plates 4, one of said plates being herein shown as rigidly attached to the outer side of each temple-stand, as by suitable screws 5, Figs. 2 and 3.

A spring 6 is herein shown as secured at one end to the plate i, and at its other end it is attached to the forwardly-extended end or arm 2 of the adjacent rocking support 2.

The springs when free to act rock said supports on-their fulcra 3 and lift the tensionbar' 1 from the position shown in Fig. 2 to that shown in Fig. 3.

An inclined slot? is made in the upper edge of each plate 4 to slidably receive, support,

and guide a longitudinally-movable controlling member 8, shown in Fig. 1 as an elongated flat bar extended from one to the other plate and at the left-hand side of the loom continued, as at 9, to the shipper S, with which it is pivotally connected at 10.

The controlling member passes beneath the outer ends of the support-arms 2 as shown, and the widest portions of the said member 8 are sufficient, when in the position shown in Figs. 1 and 2, to depress the rear ends of the supports 2 and thereby press the tension-bar 1 upon the cloth with sufficient force to increase its tension, this being obvious by the deflection of the cloth in Fig. 2.

Portions of the controlling member are reduced in width, however, as at 11, Fig. 1, the wider and narrower portions beingconnected by inclined or cam portions 12, so that said controlling member is, in fact,a longitudinallymovable cam, its movement and the position of its cam portions being controlled by the shipper.

. When the shipper isin running position, the high or widest portions of the controlling member act upon the supports, and through the tension-bar 1 the cloth is subjected to eX- tra tension between the fell and the take-up roll M. (See Figs. 1 and 2.)

Upon release of the shipper, whether by hand or by one of the automatically-acting instrumentalities of the loom, the movement of the shipper to effect stoppage of the loom slides the controlling member 8 to the left, Fig. 1, so that the low portions 11 are moved beneath the arms 2 of the rocking supports, the springs 6 instantly acting to rock the supports and raise the tension-bar 1, as in Fig. 3, slackening the cloth and permitting the fell to move toward the reed. Thus even though the lay does not beat up as far as it does when the loom is running normally the proper relative position of the fell and the reed at the instant of beating-in will be preserved, and the filling will be beaten in with the same compactness as before, and a crack will be prevented.

When the shipper is moved back to start the loom, the inclines or cams 12 on the controlling members act upon the supports to gradually depress the tension-bar 1 and place the cloth under the desired additional tension when the widest portions of the controlling members are acting upon the arms 2 of the rocking supports.

The member which throws the power onto or off from the loom (shown herein as a ship per) constitutes a device to govern the operation of the loom, such device moving into position to stop the loom when released from the notch in the holding-plate, the return of the governing device to the notch effecting the starting of the loom.

My invention is not restricted to the precise construction and arrangement herein shown and described as embodying my invention in one practical form, for various changes or modifications may be made by those skilled in the art Without departing from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is v 1. In a loom, a device to govern the operation thereof, and means, actuated by movement of said device to efilect stoppage of the loom, to slacken the cloth between the fell and the take-up and thereby prevent the formation of a crack, said means acting upon the cloth between the fell and the take-up.

2. In a loom, a device to govern the operation thereof, take-up mechanism, and means, cooperating directly with the cloth and actuated by movement of-said device to effect stoppage of the loom, to slacken the cloth independently of said take up mechanism and thereby prevent the formation of a crack.

3. In a loom, a device to govern the opera tion thereof, an instrumentality normally acting upon the cloth between the fell and the take-up, to stretch the cloth therebetween, and means, actuated by movement of said device to effect stoppage of the loom, to render inoperative said instrumentality and thereby slacken the cloth to prevent the formation of a crack.

4:. In a loom, a shipper, and means, actuated by movement of the shipper to effect stoppage of the loom, to slacken the cloth between the fell and the take-up and thereby prevent the formation of a crack.

5. In a loom, a shipper, take-up mechanism, and means, actuated by movement of the shipper to effect stoppage of the loom, to slacken the cloth behind and independently of the take-up mechanism to thereby prevent the formation of a crack.

6. In a loom, a shipper, a normally operative instrumentality to act upon and increase the tension of the cloth between the fell and the take-up, and means, actuated by movement of the shipper to effect stoppage of the loom, to render inoperative said instrumentality and thereby slacken the cloth.

7 In a loom, a shipper, a tension-bar extended across the cloth in front of the fell, movable supports therefor, a cam member to act upon the supports and thereby cause the tension-bar to press upon and tighten the cloth, and a connection between said cam member and the shipper, whereby movement of the latter to effect stoppage of the loom moves the cam member to cause a decrease in the pres sure of the tension-bar upon the cloth and thereby slacken the latter.

8. In a loom, a shipper, and means operatively connected therewith to act upon and stretch the cloth between the fell and the takeup when the shipper is moved to start the loom, and to release the cloth from such stretchsupports and relieve the cloth of the pressureof the tension-bar.

10. In a loom, a device to govern the operation thereof; and means to impart automatically-increased tension to the cloth between the fell and the take-up by or through movement of said device to start the loom, and to relieve the cloth of such tension by or through movement of said device to eflect stoppage of the loom.

11. In aloom, a device to govern the operation thereof, and tension-augmenting means for and acting upon the cloth near the fell, operatively connected With said device and rendered inoperative automatically by movement of said device to effect stoppage of the loom, to thereby decrease the tension of and slacken the cloth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ALIDA M. MARCOUX. Witnesses:

GEORGE OTIS DRAPER, ERNEST W. W001). 

